<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>404 - 页面未找到</title>
    <style>
        @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700&display=swap');

        body {
            font-family: 'Nunito', 'Arial', sans-serif;
            background-color: #f0f4ff;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            height: 100vh;
            text-align: center;
            overflow: hidden;
        }

        .container {
            max-width: 800px;
            padding: 20px;
            position: relative;
            z-index: 1;
        }

        h1 {
            color: #ff6b6b;
            font-size: 3rem;
            margin-bottom: 10px;
            text-shadow: 2px 2px 0px #ffd8d8;
            animation: bounce 2s ease infinite;
        }

        @keyframes bounce {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-10px); }
        }

        p {
            color: #5f6c7b;
            font-size: 1.2rem;
            margin-bottom: 30px;
            line-height: 1.6;
        }

        .image-container {
            position: relative;
            margin-bottom: 30px;
            transition: transform 0.3s;
        }

        .image-container:hover {
            transform: scale(1.05);
        }

        img {
            max-width: 100%;
            height: auto;
            border-radius: 20px;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }

        .back-link {
            display: inline-block;
            background-color: #4facfe;
            color: white;
            padding: 15px 30px;
            text-decoration: none;
            border-radius: 50px;
            font-weight: bold;
            font-size: 1.1rem;
            transition: all 0.3s;
            box-shadow: 0 5px 15px rgba(79, 172, 254, 0.4);
        }

        .back-link:hover {
            background-color: #00f2fe;
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(79, 172, 254, 0.6);
        }

        .bubbles {
            position: absolute;
            width: 100%;
            height: 100%;
            z-index: 0;
            overflow: hidden;
            top: 0;
            left: 0;
        }

        .bubble {
            position: absolute;
            bottom: -100px;
            width: 40px;
            height: 40px;
            background: #f1f1f1;
            border-radius: 50%;
            opacity: 0.5;
            animation: rise 10s infinite ease-in;
        }

        .bubble:nth-child(1) {
            width: 40px;
            height: 40px;
            left: 10%;
            animation-duration: 8s;
            background: #ff9a9e;
        }

        .bubble:nth-child(2) {
            width: 20px;
            height: 20px;
            left: 20%;
            animation-duration: 5s;
            animation-delay: 1s;
            background: #a1c4fd;
        }

        .bubble:nth-child(3) {
            width: 50px;
            height: 50px;
            left: 35%;
            animation-duration: 7s;
            animation-delay: 2s;
            background: #ffecd2;
        }

        .bubble:nth-child(4) {
            width: 80px;
            height: 80px;
            left: 50%;
            animation-duration: 11s;
            animation-delay: 0s;
            background: #84fab0;
        }

        .bubble:nth-child(5) {
            width: 35px;
            height: 35px;
            left: 55%;
            animation-duration: 6s;
            animation-delay: 1s;
            background: #a6c0fe;
        }

        .bubble:nth-child(6) {
            width: 45px;
            height: 45px;
            left: 65%;
            animation-duration: 8s;
            animation-delay: 3s;
            background: #fbc2eb;
        }

        .bubble:nth-child(7) {
            width: 25px;
            height: 25px;
            left: 75%;
            animation-duration: 7s;
            animation-delay: 2s;
            background: #fdcb6e;
        }

        .bubble:nth-child(8) {
            width: 60px;
            height: 60px;
            left: 85%;
            animation-duration: 9s;
            animation-delay: 1s;
            background: #e0c3fc;
        }

        @keyframes rise {
            0% {
                bottom: -100px;
                transform: translateX(0);
            }
            50% {
                transform: translateX(100px);
            }
            100% {
                bottom: 1080px;
                transform: translateX(-100px);
            }
        }
    </style>
</head>
<body>
    <div class="bubbles">
        <div class="bubble"></div>
        <div class="bubble"></div>
        <div class="bubble"></div>
        <div class="bubble"></div>
        <div class="bubble"></div>
        <div class="bubble"></div>
        <div class="bubble"></div>
        <div class="bubble"></div>
    </div>

    <div class="container">
        <h1>404 - 页面未找到</h1>
        <p>抱歉，您请求的页面不存在或已被移动。</p>

        <div class="image-container">
            <img src="images/404 NotFound.png" alt="404 错误图片">
        </div>

        <p>请检查URL是否正确，或返回首页继续浏览。</p>
        <a href="index.html" class="back-link">返回首页</a>
    </div>
</body>
</html>